In this new series, Le Jour où tout a basculé (The Day When Everything Turned Upside Down), a mother and son's close relationship is about to change. Enzo, who lives with his mother Murielle, runs into a man with a distinctive tattoo. Determined to track down the man, whom he believes to be his father, he starts an inquiry of his own despite his mother's skepticism.

Enzo is convinced a man with a thorny rose tattoo is his father. He can't wait to share his discovery with his mother, but she claims it's not possible: because of his shady past, his father can't be in the country. But Enzo doesn't want to believe her....

Enzo's mother finally admits that she knew of his father's whereabouts and asks for Enzo's forgiveness for keeping it a secret. Enzo is still in shock and not ready to forgive her. He's following another lead, a young woman who may eventually take him to his real father.

Enzo unexpectedly meets his father for the first time at Angèle's house. Feeling extremely awkward, he cuts short his visit with Angèle, who, of course, doesn't understand. She later reveals her true feelings for Enzo, who recoils when she tries to kiss him. Angèle storms off, hurt and mystified.

Enzo meets Angèle's dad Brice again and seizes the opportunity to take a picture of him by pretending to admire his tattoo. His hopes of finding his real father are dashed when he shows his mother the photograph, and she doesn't recognize the face. The only bright spot in all this is that Angèle may not be his sister after all.

Enzo has not heard from Angèle since the fiasco of his last visit, but he does hear from Brice, who contacts him unexpectedly to share stories about his father. Enzo finds out that Brice used to be a very close friend of his father's, and Enzo is thrilled to gather some information at last.

Enzo and Brice have an unexpected visit from Murielle at the café. After eavesdropping on their conversation, she walks up to them and calls out Alain's name, hoping that Brice will respond and reveal his true identity. Instead, Brice draws a blank face and flees the scene.

In this episode of "Le Jour où tout a basculé" (The Day Everything Turned Upside Down), Sybille, a bored and lonely housewife, has developed the peculiar habit of spying on her neighbors across the street, much to her husband's dismay.

Sybille is concerned that the man she's been spying on is now watching her. Undaunted, she walks across to his apartment building to investigate. But she is stopped in her tracks, and things don't go according to plan.

Sybille's anxiety escalates as the spying continues. The stranger across the street is staring out the window all day long. To make matters worse, her husband comes home late, very late, and is less than sympathetic to her plight...

Sybille and Édouard are still at odds with each other as Sybille now accuses him point-blank of having an affair with Vanessa. The mysterious neighbor doesn't cooperate with Édouard's scheming but pursues her own agenda.

Sybille and Édouard meet for drinks at Vanessa's apartment. Vanessa finally admits that a tenant lives with her, but he remains elusive. Vanessa's dubious explanations do not satisfy Sybille and only add to her curiosity.

Sybille finally finds an opportunity to knock on the door of the stranger who has been spying on her for weeks. She braces herself and confronts the stranger.... Or is he a stranger? A pleasant surprise is in store for her.

Édouard's life is starting to unravel as the awful truth comes out. Benoît makes some startling revelations to Sybille, but she is not entirely surprised. It's not all gloom and doom for her, however, as an old flame is rekindled between them...

Vanessa is coming over to Sybille's house, which is now Benoît's as well. They don't need to spy on each other anymore, but Vanessa is bringing her binoculars anyway. As for Édouard... justice has prevailed.

In part one of "Le Jour où tout a basculé: Nos bébés ont été échangés" (The Day When Everything Changed: Our Babies Were Switched at Birth), a family is in turmoil. Frédéric is very jealous of his wife Anne-Sophie and accuses her of having an affair with an old flame. Although all the evidence seems plausible, is there another explanation?

Anne-Sophie and Frédéric are at loggerheads and won't speak to each other due to the unexpected results of a paternity test. Anne-Sophie receives some news at the end of the video that suggests the situation will become even more complicated.

While Anne-Sophie and Frédéric have a meeting with Manon's biological mother, Manon carries out her own investigation and finds the detective's report. By the time her parents come home, she's gone, and panic sets in when Frédéric discovers her farewell note.

After running away from home, Manon finally decides to come back, only to be confronted with Émilie, her parent's biological daughter. Fortunately, Émilie manages to rescue the situation and convinces Manon to stay and speak with her parents.

In this last segment of "Nos bébés ont été échangés," you will discover how the two families are coping with their shocking revelation. Manon will meet her biological mother Létitia and become friends with Létitia's daughter Émilie in the process.

Soon after Claire and Harold move into their new Parisian apartment, strange things start to open. Their new neighbors explain that their new home may have been the scene of a murder. Claire believes it, but Harold remains skeptical. Will they be able to solve this mystery?

Claire and Harold invite their new neighbors for drinks to get acquainted and thank them for their help. As the evening unfolds, the conversation becomes strained and strange things start to happen. Claire and Harold are left with many unanswered questions.

Claire and Harold go to bed exhausted after a long day of moving in to their new apartment. While Harold succumbs to sleep, Claire is wide awake. She investigates some strange noises coming from the living room.

Harold and Claire are having dinner when they hear some strange noises in their apartment again. Looking for a rational explanation, Harold asks their neighbors, Bastien and Solène. They seem to think that the apartment is haunted, but Harold has his doubts.

Claire's fears escalate and the situation becomes unbearable for her. She is convinced that the apartment is haunted, while her level-headed husband tries to remain calm, which infuriates her even more... and creates a wedge between them.

Adèle always thought that her father was dead, until a mysterious letter from her so-called half-brother arrived in the mail. After being told repeatedly by her family that her father died in a car crash years ago, Adèle is confused and shaken by the letter.